FAAC MASTER-B Manual page 9

11.2 Connection of photocells and safety devices
Before connecting the photocells (or other devices) we advise
you to select the type of operation according to the movement
zone to be protected (see Fig.9).
Opening/closing safety devices
Closing safety devices
Attention
: a maximum of 2 pairs of SAFEBEAM photocells can be connected to the MASTER-B board
1 pair of CLOSING
photocells
2 pairs of CLOSING
photocells
Opening safety
devices
Fig. 9
Examples of photocell connections
connection of no devices
Fig. 12
22
N.B.: If two or more devices with N.C. contact have the same
function, they must be connected to each other in
series (Fig. 10).
Connection of 2 NC contacts in series
N.B.: If two or more devices with N.A. contact have the same
function, they must be connected to each other in
parallel (Fig. 11).
Connection of 2 NA contacts in parallel
1 pair of OPENING photocells
1 pair of CLOSING photocells and 1
pair of OPENING/CLOSING photocells
Fig. 10
Fig. 11